US National Security Adviser: 'Clock is Ticking' on Iran

The U.S. national security adviser says
Washington is still open to nuclear negotiations with Iran, but the picture is
not a "good one." Jim Jones said Sunday the "clock is ticking" toward the end of
the year, when President Barack Obama plans to review U.S. diplomatic efforts
with Iran.

Iran's Natanz
Uranium Enrichment Facility south of TehranIran says its nuclear program is strictly for peaceful purposes

Senior U.S. officials have proposed pursuing new
sanctions at the U.N. Security Council if Iran does not cooperate with the
international community on its nuclear program.

The United States and other world powers suspect Iran is developing nuclear
weapons. Tehran says its program is peaceful.

Iranian Supreme Leader Ayatollah Ali Khamenei accused world powers Sunday of
lying about Tehran's nuclear program to isolate the country.